Finding the Fourth Proportional to 215,019.72, 296,708.99 and 118,218.38

Step by Step Solution

1. Step 1: Write the proportion equation
   215,019.72 : 296,708.99 = 118,218.38 : x
2. Step 2: Convert to fraction form
   215,019.72/296,708.99 = 118,218.38/x
3. Step 3: Cross multiply
   215,019.72x = 296,708.99 × 118,218.38
4. Step 4: Simplify right side
   215,019.72x = 35,076,454,054.60
5. Step 5: Solve for x
   x = 35,076,454,054.60/215,019.72
6. Step 6: Final answer
   x = 163,131.34